Antenna



FIG. 1 is a bottom plan view of an antenna.

FIG. 2 is a top plan view of the antenna of FIG. 1.

FIG. 3 is a top perspective view of the antenna of FIG. 1.

FIG. 4 is a front view of the antenna of FIG. 1.

FIG. 5 is a rear view of the antenna of FIG. 1.

FIG. 6 is a left side view of the antenna of FIG. 1; and,

FIG. 7 is a right side view of the antenna of FIG. 1.

The broken line showing is for illustrative purposes only and forms no part of the claimed design. 

CLAIM The ornamental design for an antenna, as shown and described. 